MPQ4456 Datasheet, PDF (1/16 Pages) Monolithic Power Systems – Industrial Grade ,1A, 4MHz, 36V Step-Down Converter

The Future of Analog IC Technology
DESCRIPTION
The MPQ4456 is a high frequency step-down
switching regulator with an integrated internal
high-side high voltage power MOSFET. It
provides 1 A output with current mode control
for fast loop response and easy compensation.
The wide 3.8V to 36V input range
accommodates a variety of step-down
applications, including those in automotive
systems. A 120µA operational quiescent current
is suitable for use in battery-powered
applications.
Special controlled circuitry allows the MPQ4456
to maintain PWM operation at low output
currents. This lowers noise by reducing the
pulse skipping.
By switching at 4MHz, the MPQ4456 prevents
EMI (Electromagnetic Interference) noise
problems, such as those found in AM radio and
ADSL applications.
The MPQ4456 is available in thin 10-pin 3mm x 3mm
TQFN package.
MPQ4456
Industrial Grade ,1A, 4MHz, 36V
Step-Down Converter
FEATURES
• Guaranteed Industrial Temp Range
• 120µA Quiescent Current
• Wide 3.8V to 36V Operating Input Range
• 300mΩ Internal Power MOSFET
• Up to 4MHz Programmable Switching
Frequency
• Ceramic Capacitor Stable
• Internal Soft-Start
• Extended PWM Operation Reduces Noise
• Up to 95% Efficiency
• Output Adjustable from 0.8V to 36V
• Available in 10-Pin 3x3 TQFN Package
APPLICATIONS
• High Voltage Power Conversion
• Automotive Systems
• Industrial Power Systems
• Distributed Power Systems
• Battery Powered Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
CONTRO L
C3
150pF
4
COM P
8, 9
VIN
C6
NS
3
EN
10
BST
MPQ4456
7
FREQ
1, 2
SW
5
FB
6
GND
C4
100nF
10MQ100N
V _IN
36V Max
Efficiency vs
Load Current
100
90
V_I=5V
80
70
V_I=12V
V_I=24V
60
50
40
30
V_O=3.3V
20
0
500
LOAD CURRENT (mA)
1000
MPQ4456 Rev. 1.0
www.MonolithicPower.com
1
2/8/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.